Ceramic Insulator
Porcelain cross-arms that replace the steel arm and the pin insulator in one piece, rated 2.5 kN and 5.0 kN bending.
- Bending load
- 2.5 and 5.0 kN
- Insulation distance
- 315–520 mm
- Creepage
- 320–1120 mm
- Material
- Porcelain, glazed
A porcelain cross-arm is bolted straight to the pole and carries the conductor on its own body. Because the arm itself insulates, the steel cross-arm and the pin insulator both disappear from the pole top.
That leaves one less fitting to corrode and one less earthed metal part above the pole. The trade-off is handling: a porcelain arm has to be carried and lifted with more care than a steel one.
Five types are made, at 2.5 kN and 5.0 kN bending, with insulation distances from 315 mm to 520 mm.
Specifications
Values published for each type.
| Type | Insulation distancemm | Minimum creepagemm | Rated bending failing loadkN |
|---|---|---|---|
| RA2.5ET165N | 315 | 320 | 2.5 |
| RA2.5ET185L | 365 | 380 | 2.5 |
| RA5.0ET165L | 320 | 360 | 5 |
| RA5.0ET250N | 490 | 700 | 5 |
| RA5.0ET265L | 520 | 1120 | 5 |
Choosing a Type
Fewer Parts
One porcelain arm replaces the steel cross-arm, the pin insulator and the bonding that goes with them.
Bending Load
2.5 kN covers the shorter arms; 5.0 kN is the heavier body, for spans and ice loads the smaller arm cannot take.
Every arm is bending-tested before it is packed, and each type is type-tested before it is offered for supply.
Ask about Ceramic Insulator
Send the type designation, the quantity and the standard the project is working to. We reply with a price and a delivery date.
We usually reply within one working day.